/*      $OpenBSD: ffs.S,v 1.2 1996/09/27 06:47:45 mickey Exp $  */

/*
 * Written by J.T. Conklin <jtc@netbsd.org>.
 * Public domain.
 */

#include <machine/asm.h>

ENTRY(ffs)
        bsfl    4(%esp),%eax
        jz      L1                      /* ZF is set if all bits are 0 */
        incl    %eax                    /* bits numbered from 1, not 0 */
        ret

        .align 2
L1:     xorl    %eax,%eax               /* clear result */
        ret